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Round|Lab Grown|IGI

1.27ct E SI1 Round Lab Grown Diamond

EX • E/SI1 • IGI LG656402458

Shape and cutting style on the report: Round brilliant

Certificate IGI LG656402458

Diamond specifications and retailer prices

From £111 GBP
As of November 5, 2026
Save £534 GBP (83%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £645 GBP at MOH London · As of November 4, 2026
View at MOH London

About this 1.27ct lab-grown round diamond

This 1.27ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG656402458 or 656402458. Listed at 20 retailers as of November 4, 2026, with prices from £111 to £645, a £534 spread on the same certified stone. MOH London lists it at £645. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.27
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.9°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG656402458
Dimensions7.08 × 7.01 × 4.16 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.08 mm7.01 mm1.27 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG656402458
Side View
Table 61.0%Crown 32.9°Girdle: MED-STKPavilion 40.4°Culet: NoneDepth 59.0%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £645 GBP|Low: £111 GBP|High: £655 GBP|Avg: £324 GBP|-1.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 10£111 GBP
Retailer 12£138 GBP
Retailer 2£236 GBP
Retailer 3£254 GBP
Retailer 7£265 GBP
Retailer 5£267 GBP
Retailer 4£295 GBP
Retailer 8£342 GBP
Retailer 6£345 GBP
Retailer 11£438 GBP
Retailer 9£470 GBP
MOH London£645 GBP

42 data points across 12 retailers

20 retailers£111 GBP to £645 GBP

Retailer 1
-
£111 GBP
Price last confirmed 45 days ago
A
Retailer 2
-
£111 GBP
View
Retailer 3
-
£129 GBP
View
Price last confirmed 45 days ago
Retailer 4
-
£137 GBP
View
Price last confirmed 45 days ago
Retailer 5
-
£138 GBP
View
Price last confirmed 12 days ago
A
Retailer 6
-
£138 GBP
View
A
Retailer 7
-
£236 GBP
View
B+
Retailer 8
-
£254 GBP
View
Retailer 9
-
£265 GBP
View
Price last confirmed 8 days ago
A
Retailer 10
-
£267 GBP
View
A
Retailer 11
-
£295 GBP
View
B+
Retailer 12
-
£327 GBP
View
B+
Retailer 13
-
£342 GBP
View
B+
Retailer 14
-
£345 GBP
View
Retailer 15
-
£353 GBP
View
Price last confirmed 47 days ago
B
Retailer 16
-
£438 GBP
View
B
Retailer 17
-
£445 GBP
View
Retailer 18
-
£445 GBP
View
Price last confirmed 46 days ago
B+
Retailer 19
-
£470 GBP
View
Most Expensive
B
MOH London
LG656402458 · Nov 4
£645 GBP
View
19 more retailers have this diamond
Prices start from £111 GBPSave up to £534 GBP

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
1.27ct Round
£111 GBP